A Study on the mixing of Tiafenacil (30% SC, 70% WG) with surfactant for Stable Efficacy

Sung Jun Park1,*   Tae Hyun Oh1   Kyung Sung Kim2   

1Product Development Team, Crop Protection, Farmhannong Co., Ltd., Seoul, 07320, Korea
2Crop Protection Research Team􏚊 Crop protection Research Institute Farmhannong Co., Ltd., Nonsan, 33010, Korea


Tiafenacil (brand name: Terrad’or®) is a non-selective herbicide developed by Farmhannong. There are various products containing tiafenacil. Especially Tiafenacil 30% SC and Tiafenacil 70% WG have been aiming to be commercialized for Global market. These herbicides containing high content of active ingredient do not have surfactants comparing other herbicides registered in Korea. Therefore, additional surfactants should be tank-mixed for exhibiting stable efficacy. In this study, we verified enhanced effect of Tiafenacil 30% SC and Tiafenacil 70% WG by mixing surfactant. Tiafenacil 5% SC, a product pre-mixed with a surfactant, was used as control. Siloxane 30% SL was used as the surfactant in the study. The control efficacy was evaluated by visual inspection on Digitaria ciliaris, Echinochloa crus-galli, Trifolium repens, Cyperus microiria, Erigeron annuus, Chenopodium album var. centrorubrum, Portulaca oleracea. Without Siloxane 30% SL, Tiafenacil 30% SC and Tiafenacil 70% WG showed the low efficacy on Digitaria ciliaris, Echinochloa crus-galli, Chenopodium album var. centrorubrum. However, its efficacy increased to the same level of the comparative herbicide when Siloxane 30% SL was added.

Figures & Tables

Fig. 1. Efficacy of Tiafenacil 30% SC for summer season weeds.